I like watching defunctland videos where he explores things. Those are usually 1hour+ but they get super interesting.

6

Down the Rabbit Hole has some very long (but interesting) videos. BobbyBroccoli has multipart series with really good animation, he covers controversies in science mostly

3

Adventures gone wrong

1

Entertainment made by North Korea by Paper will. It’s five and a half hours and pretty interesting.

1

I love listening to just any oneyplays vid

1